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Has my A/F changed much?

Old 02-15-2005, 03:52 PM
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Default Has my A/F changed much?

So I tuned my setup with a stock exhaust and have recently upgraded to a 2.5 all the way back. Wondering if my a/f has really changed enough to worry about running a bit lean. I know I need to get on a wb to really tell but any input is appreciated.
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Old 02-15-2005, 03:59 PM
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Default Re:Has my A/F changed much?

the only thing i can think of is if it is getting some boost creep now and you tuned it at say 8 psi, then maybe you would need to tune the cells from 8-10 psi if its hitting more boost....but if its not boost creeping at all it should be fine...
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Old 02-15-2005, 04:18 PM
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Default Re:Has my A/F changed much?

the boost has held steady
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Old 02-15-2005, 09:05 PM
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Default Re:Has my A/F changed much?

did you notice a power increase?

if it was severe enough to notice on the butt dyno i would say yes...get a wideband on it to at least check where you are at.

If you tuned it conservatively before though...you should be relatively fine now
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Old 02-16-2005, 03:03 PM
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Default Re:Has my A/F changed much?

Originally Posted by xenocron
did you notice a power increase?

if it was severe enough to notice on the butt dyno i would say yes...get a wideband on it to at least check where you are at.

If you tuned it conservatively before though...you should be relatively fine now
thanks for the input......I have access to a wb but its just been too cold out but hopefully it'll be warm next week
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Old 02-16-2005, 03:51 PM
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Default Re:Has my A/F changed much?

Cold and freeing flowing exhaust dont make for a good combo...dont rape your motor, you may be running lean. pay attention and listen carefully for detonation.
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Old 02-17-2005, 02:12 AM
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Default Re:Has my A/F changed much?

Originally Posted by xenocron
Cold and freeing flowing exhaust dont make for a good combo...dont rape your motor, you may be running lean. pay attention and listen carefully for detonation.
Yeah I've been told but I can't help it, everytime I see drive pavement :P. It's definately making more power but new exhaust is louder now so I can't even hear ping anymore. I'm going to have to start laying off it till I retune.
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